20047+4938 ES 2688BC

 
 
20h 04m 40.11s +49 38' 27.8" P.A. 169 sep 15.4 mag 10.41,15.10 Sp A2
 
 
Coord 2000
20047+4938
Discov num
ES 2688
Comp
BC
Coord arcsec 2000
20 04 40.11 +49 38 27.8
Date first
1909
Date last
2015
Obs
5
Pa first
159
Pa last
169
P.A. Now (θ)
169°
Sep first
13.9
Sep last
15.4
Sep. Now (ρ)
15.4"
Mag pri
10.41
Mag sec
15.10
delta mag (ΔM)
4.69
Spectral class
A2 (white)
Pri motion ra
+007
Sec motion ra
Pri motion dec
-016
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20047+4938 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20047+4938 KU 58 AB 1901 2018 15 186 2.9 10.23 10.41 0.18
Show 20047+4938 ES 2688 BC 1909 2015 5 169 15.4 10.41 15.10 4.69 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
168.8
Precise sep
15.392
Constellation
Cygnus
Tycho2
3567-00721-1
Gaia DR2
85222802048
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20047+4938 ES 2688 BC 1909 1 159 13.9 9.00 13.70 200408.57+493800.0
20047+4938 ES 2688 BC 1999 2 151 16.4 10.41 15.10 D 200440.11+493827.8
20047+4938 ES 2688 BC 2003 3 152 18.0 10.41 15.10 D 200440.11+493827.8
20047+4938 ES 2688 BC 2011 4 169 15.7 10.41 15.10 D 200440.11+493827.8
20047+4938 ES 2688 BC 2015 5 169 15.4 10.41 15.10 A2 200440.11+493827.8

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